Grundfos 509921, Instructions Manual

Page: 15 / 26

English (GB)
15
7. Setting the product
To set the product use the button on the operating panel. Every
time you press the button, the pump setting is changed. The
LEDs will indicate the chosen control mode. A cycle is five button
presses.
The pump automatically enables the PWM input-signal control
mode when the signal cable is plugged in and the PWM signal is
detected by the pump. If the pump does not detect a PWM signal
or if the signal equals 0, the pump will switch to the control mode
selected before connecting to a PWM signal. For details on
setting the PWM input signal, see section
7.1 Setting the PWM
input signal .
To select the fixed proportional-pressure curve, press and hold
the button for 3 seconds. To disable this control mode, press and
hold the button for 3 seconds.
To learn more about each control mode, see section
6.2 Control
modes .
Display Control mode
Constant curve 1
Constant curve 2
Constant curve 3
Radiator mode
Underfloor mode
PWM profile A
The LED flashes.
Fixed control curve
The LEDs flash.
The pump has been factory-set to radiator heating
mode.